Within Europe the realpolitik's very delicate (8)
I believe the answer is:
ethereal
'very delicate' is the definition.
(I've seen this before)
'within europe the realpolitik's' is the wordplay.
'within' indicates a hidden word.
'ETHEREAL' is hidden in the letters of 'europe the realpolitik'.
(Other definitions for ethereal that I've seen before include "Extremely delicate and light, not of this world" , "Take ale there: it's light and delicate" , "Insubstantial or not of this world" , "gossamer" , "Of the spirit" .)